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Commit | Line | Data |
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176fb0d1 LP |
1 | /* |
2 | * Media device | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
7 | * Sakari Ailus <sakari.ailus@iki.fi> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
b0a1f2a8 SA |
23 | #include <linux/compat.h> |
24 | #include <linux/export.h> | |
176fb0d1 | 25 | #include <linux/ioctl.h> |
140d8816 | 26 | #include <linux/media.h> |
57208e5e | 27 | #include <linux/slab.h> |
497e80cd | 28 | #include <linux/types.h> |
176fb0d1 LP |
29 | |
30 | #include <media/media-device.h> | |
31 | #include <media/media-devnode.h> | |
53e269c1 | 32 | #include <media/media-entity.h> |
176fb0d1 | 33 | |
e576d60b SK |
34 | #ifdef CONFIG_MEDIA_CONTROLLER |
35 | ||
140d8816 LP |
36 | /* ----------------------------------------------------------------------------- |
37 | * Userspace API | |
38 | */ | |
39 | ||
40 | static int media_device_open(struct file *filp) | |
41 | { | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static int media_device_close(struct file *filp) | |
46 | { | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static int media_device_get_info(struct media_device *dev, | |
51 | struct media_device_info __user *__info) | |
52 | { | |
53 | struct media_device_info info; | |
54 | ||
55 | memset(&info, 0, sizeof(info)); | |
56 | ||
57 | strlcpy(info.driver, dev->dev->driver->name, sizeof(info.driver)); | |
58 | strlcpy(info.model, dev->model, sizeof(info.model)); | |
59 | strlcpy(info.serial, dev->serial, sizeof(info.serial)); | |
60 | strlcpy(info.bus_info, dev->bus_info, sizeof(info.bus_info)); | |
61 | ||
62 | info.media_version = MEDIA_API_VERSION; | |
63 | info.hw_revision = dev->hw_revision; | |
64 | info.driver_version = dev->driver_version; | |
65 | ||
b17d3945 NT |
66 | if (copy_to_user(__info, &info, sizeof(*__info))) |
67 | return -EFAULT; | |
68 | return 0; | |
140d8816 LP |
69 | } |
70 | ||
1651333b LP |
71 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
72 | { | |
73 | struct media_entity *entity; | |
74 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
75 | ||
76 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
77 | ||
78 | spin_lock(&mdev->lock); | |
79 | ||
80 | media_device_for_each_entity(entity, mdev) { | |
fa762394 MCC |
81 | if (((media_entity_id(entity) == id) && !next) || |
82 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
83 | spin_unlock(&mdev->lock); |
84 | return entity; | |
85 | } | |
86 | } | |
87 | ||
88 | spin_unlock(&mdev->lock); | |
89 | ||
90 | return NULL; | |
91 | } | |
92 | ||
93 | static long media_device_enum_entities(struct media_device *mdev, | |
94 | struct media_entity_desc __user *uent) | |
95 | { | |
96 | struct media_entity *ent; | |
97 | struct media_entity_desc u_ent; | |
98 | ||
e6a62346 | 99 | memset(&u_ent, 0, sizeof(u_ent)); |
1651333b LP |
100 | if (copy_from_user(&u_ent.id, &uent->id, sizeof(u_ent.id))) |
101 | return -EFAULT; | |
102 | ||
103 | ent = find_entity(mdev, u_ent.id); | |
104 | ||
105 | if (ent == NULL) | |
106 | return -EINVAL; | |
107 | ||
fa762394 | 108 | u_ent.id = media_entity_id(ent); |
de8eae36 LP |
109 | if (ent->name) |
110 | strlcpy(u_ent.name, ent->name, sizeof(u_ent.name)); | |
0e576b76 | 111 | u_ent.type = ent->function; |
8ed8c88c | 112 | u_ent.revision = 0; /* Unused */ |
1651333b | 113 | u_ent.flags = ent->flags; |
8ed8c88c | 114 | u_ent.group_id = 0; /* Unused */ |
1651333b LP |
115 | u_ent.pads = ent->num_pads; |
116 | u_ent.links = ent->num_links - ent->num_backlinks; | |
fa5034c6 | 117 | memcpy(&u_ent.raw, &ent->info, sizeof(ent->info)); |
1651333b LP |
118 | if (copy_to_user(uent, &u_ent, sizeof(u_ent))) |
119 | return -EFAULT; | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
124 | struct media_pad_desc *upad) | |
125 | { | |
fa762394 | 126 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
127 | upad->index = kpad->index; |
128 | upad->flags = kpad->flags; | |
129 | } | |
130 | ||
b0a1f2a8 SA |
131 | static long __media_device_enum_links(struct media_device *mdev, |
132 | struct media_links_enum *links) | |
1651333b LP |
133 | { |
134 | struct media_entity *entity; | |
1651333b | 135 | |
b0a1f2a8 | 136 | entity = find_entity(mdev, links->entity); |
1651333b LP |
137 | if (entity == NULL) |
138 | return -EINVAL; | |
139 | ||
b0a1f2a8 | 140 | if (links->pads) { |
1651333b LP |
141 | unsigned int p; |
142 | ||
143 | for (p = 0; p < entity->num_pads; p++) { | |
144 | struct media_pad_desc pad; | |
c88e739b DC |
145 | |
146 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 147 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 148 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
149 | return -EFAULT; |
150 | } | |
151 | } | |
152 | ||
b0a1f2a8 | 153 | if (links->links) { |
b83e2508 MCC |
154 | struct media_link *link; |
155 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 156 | |
b83e2508 MCC |
157 | list_for_each_entry(link, &entity->links, list) { |
158 | struct media_link_desc klink_desc; | |
1651333b LP |
159 | |
160 | /* Ignore backlinks. */ | |
b83e2508 | 161 | if (link->source->entity != entity) |
1651333b | 162 | continue; |
b83e2508 MCC |
163 | memset(&klink_desc, 0, sizeof(klink_desc)); |
164 | media_device_kpad_to_upad(link->source, | |
165 | &klink_desc.source); | |
166 | media_device_kpad_to_upad(link->sink, | |
167 | &klink_desc.sink); | |
168 | klink_desc.flags = link->flags; | |
169 | if (copy_to_user(ulink_desc, &klink_desc, | |
170 | sizeof(*ulink_desc))) | |
1651333b | 171 | return -EFAULT; |
b83e2508 | 172 | ulink_desc++; |
1651333b LP |
173 | } |
174 | } | |
b0a1f2a8 SA |
175 | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static long media_device_enum_links(struct media_device *mdev, | |
180 | struct media_links_enum __user *ulinks) | |
181 | { | |
182 | struct media_links_enum links; | |
183 | int rval; | |
184 | ||
185 | if (copy_from_user(&links, ulinks, sizeof(links))) | |
186 | return -EFAULT; | |
187 | ||
188 | rval = __media_device_enum_links(mdev, &links); | |
189 | if (rval < 0) | |
190 | return rval; | |
191 | ||
1651333b LP |
192 | if (copy_to_user(ulinks, &links, sizeof(*ulinks))) |
193 | return -EFAULT; | |
b0a1f2a8 | 194 | |
1651333b LP |
195 | return 0; |
196 | } | |
197 | ||
97548ed4 LP |
198 | static long media_device_setup_link(struct media_device *mdev, |
199 | struct media_link_desc __user *_ulink) | |
200 | { | |
201 | struct media_link *link = NULL; | |
202 | struct media_link_desc ulink; | |
203 | struct media_entity *source; | |
204 | struct media_entity *sink; | |
205 | int ret; | |
206 | ||
207 | if (copy_from_user(&ulink, _ulink, sizeof(ulink))) | |
208 | return -EFAULT; | |
209 | ||
210 | /* Find the source and sink entities and link. | |
211 | */ | |
212 | source = find_entity(mdev, ulink.source.entity); | |
213 | sink = find_entity(mdev, ulink.sink.entity); | |
214 | ||
215 | if (source == NULL || sink == NULL) | |
216 | return -EINVAL; | |
217 | ||
218 | if (ulink.source.index >= source->num_pads || | |
219 | ulink.sink.index >= sink->num_pads) | |
220 | return -EINVAL; | |
221 | ||
222 | link = media_entity_find_link(&source->pads[ulink.source.index], | |
223 | &sink->pads[ulink.sink.index]); | |
224 | if (link == NULL) | |
225 | return -EINVAL; | |
226 | ||
227 | /* Setup the link on both entities. */ | |
228 | ret = __media_entity_setup_link(link, ulink.flags); | |
229 | ||
230 | if (copy_to_user(_ulink, &ulink, sizeof(ulink))) | |
231 | return -EFAULT; | |
232 | ||
233 | return ret; | |
234 | } | |
235 | ||
8309f47c MCC |
236 | static long __media_device_get_topology(struct media_device *mdev, |
237 | struct media_v2_topology *topo) | |
238 | { | |
239 | struct media_entity *entity; | |
240 | struct media_interface *intf; | |
241 | struct media_pad *pad; | |
242 | struct media_link *link; | |
b3b7a9f1 MCC |
243 | struct media_v2_entity kentity, *uentity; |
244 | struct media_v2_interface kintf, *uintf; | |
245 | struct media_v2_pad kpad, *upad; | |
246 | struct media_v2_link klink, *ulink; | |
9033b1a4 MCC |
247 | unsigned int i; |
248 | int ret = 0; | |
8309f47c MCC |
249 | |
250 | topo->topology_version = mdev->topology_version; | |
251 | ||
252 | /* Get entities and number of entities */ | |
253 | i = 0; | |
b3b7a9f1 | 254 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
255 | media_device_for_each_entity(entity, mdev) { |
256 | i++; | |
b3b7a9f1 | 257 | if (ret || !uentity) |
8309f47c MCC |
258 | continue; |
259 | ||
260 | if (i > topo->num_entities) { | |
261 | ret = -ENOSPC; | |
262 | continue; | |
263 | } | |
264 | ||
265 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
266 | memset(&kentity, 0, sizeof(kentity)); |
267 | kentity.id = entity->graph_obj.id; | |
268 | kentity.function = entity->function; | |
269 | strncpy(kentity.name, entity->name, | |
270 | sizeof(kentity.name)); | |
8309f47c | 271 | |
b3b7a9f1 | 272 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 273 | ret = -EFAULT; |
b3b7a9f1 | 274 | uentity++; |
8309f47c MCC |
275 | } |
276 | topo->num_entities = i; | |
277 | ||
278 | /* Get interfaces and number of interfaces */ | |
279 | i = 0; | |
b3b7a9f1 | 280 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
281 | media_device_for_each_intf(intf, mdev) { |
282 | i++; | |
b3b7a9f1 | 283 | if (ret || !uintf) |
8309f47c MCC |
284 | continue; |
285 | ||
286 | if (i > topo->num_interfaces) { | |
287 | ret = -ENOSPC; | |
288 | continue; | |
289 | } | |
290 | ||
b3b7a9f1 | 291 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
292 | |
293 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
294 | kintf.id = intf->graph_obj.id; |
295 | kintf.intf_type = intf->type; | |
296 | kintf.flags = intf->flags; | |
8309f47c MCC |
297 | |
298 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
299 | struct media_intf_devnode *devnode; | |
300 | ||
301 | devnode = intf_to_devnode(intf); | |
302 | ||
b3b7a9f1 MCC |
303 | kintf.devnode.major = devnode->major; |
304 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
305 | } |
306 | ||
b3b7a9f1 | 307 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 308 | ret = -EFAULT; |
b3b7a9f1 | 309 | uintf++; |
8309f47c MCC |
310 | } |
311 | topo->num_interfaces = i; | |
312 | ||
313 | /* Get pads and number of pads */ | |
314 | i = 0; | |
b3b7a9f1 | 315 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
316 | media_device_for_each_pad(pad, mdev) { |
317 | i++; | |
b3b7a9f1 | 318 | if (ret || !upad) |
8309f47c MCC |
319 | continue; |
320 | ||
321 | if (i > topo->num_pads) { | |
322 | ret = -ENOSPC; | |
323 | continue; | |
324 | } | |
325 | ||
b3b7a9f1 | 326 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
327 | |
328 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
329 | kpad.id = pad->graph_obj.id; |
330 | kpad.entity_id = pad->entity->graph_obj.id; | |
331 | kpad.flags = pad->flags; | |
8309f47c | 332 | |
b3b7a9f1 | 333 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 334 | ret = -EFAULT; |
b3b7a9f1 | 335 | upad++; |
8309f47c MCC |
336 | } |
337 | topo->num_pads = i; | |
338 | ||
339 | /* Get links and number of links */ | |
340 | i = 0; | |
b3b7a9f1 | 341 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 342 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
343 | if (link->is_backlink) |
344 | continue; | |
345 | ||
8309f47c MCC |
346 | i++; |
347 | ||
b3b7a9f1 | 348 | if (ret || !ulink) |
8309f47c MCC |
349 | continue; |
350 | ||
351 | if (i > topo->num_links) { | |
352 | ret = -ENOSPC; | |
353 | continue; | |
354 | } | |
355 | ||
b3b7a9f1 | 356 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
357 | |
358 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
359 | klink.id = link->graph_obj.id; |
360 | klink.source_id = link->gobj0->id; | |
361 | klink.sink_id = link->gobj1->id; | |
362 | klink.flags = link->flags; | |
8309f47c | 363 | |
b3b7a9f1 | 364 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 365 | ret = -EFAULT; |
b3b7a9f1 | 366 | ulink++; |
8309f47c MCC |
367 | } |
368 | topo->num_links = i; | |
369 | ||
370 | return ret; | |
371 | } | |
372 | ||
373 | static long media_device_get_topology(struct media_device *mdev, | |
374 | struct media_v2_topology __user *utopo) | |
375 | { | |
376 | struct media_v2_topology ktopo; | |
377 | int ret; | |
378 | ||
379 | ret = copy_from_user(&ktopo, utopo, sizeof(ktopo)); | |
380 | ||
381 | if (ret < 0) | |
382 | return ret; | |
383 | ||
384 | ret = __media_device_get_topology(mdev, &ktopo); | |
385 | if (ret < 0) | |
386 | return ret; | |
387 | ||
388 | ret = copy_to_user(utopo, &ktopo, sizeof(*utopo)); | |
389 | ||
390 | return ret; | |
391 | } | |
392 | ||
140d8816 LP |
393 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
394 | unsigned long arg) | |
395 | { | |
396 | struct media_devnode *devnode = media_devnode_data(filp); | |
397 | struct media_device *dev = to_media_device(devnode); | |
398 | long ret; | |
399 | ||
400 | switch (cmd) { | |
401 | case MEDIA_IOC_DEVICE_INFO: | |
402 | ret = media_device_get_info(dev, | |
403 | (struct media_device_info __user *)arg); | |
404 | break; | |
405 | ||
1651333b LP |
406 | case MEDIA_IOC_ENUM_ENTITIES: |
407 | ret = media_device_enum_entities(dev, | |
408 | (struct media_entity_desc __user *)arg); | |
409 | break; | |
410 | ||
411 | case MEDIA_IOC_ENUM_LINKS: | |
412 | mutex_lock(&dev->graph_mutex); | |
413 | ret = media_device_enum_links(dev, | |
414 | (struct media_links_enum __user *)arg); | |
415 | mutex_unlock(&dev->graph_mutex); | |
416 | break; | |
417 | ||
97548ed4 LP |
418 | case MEDIA_IOC_SETUP_LINK: |
419 | mutex_lock(&dev->graph_mutex); | |
420 | ret = media_device_setup_link(dev, | |
421 | (struct media_link_desc __user *)arg); | |
422 | mutex_unlock(&dev->graph_mutex); | |
423 | break; | |
424 | ||
8309f47c MCC |
425 | case MEDIA_IOC_G_TOPOLOGY: |
426 | mutex_lock(&dev->graph_mutex); | |
427 | ret = media_device_get_topology(dev, | |
428 | (struct media_v2_topology __user *)arg); | |
429 | mutex_unlock(&dev->graph_mutex); | |
430 | break; | |
431 | ||
140d8816 LP |
432 | default: |
433 | ret = -ENOIOCTLCMD; | |
434 | } | |
435 | ||
436 | return ret; | |
437 | } | |
438 | ||
b0a1f2a8 SA |
439 | #ifdef CONFIG_COMPAT |
440 | ||
441 | struct media_links_enum32 { | |
442 | __u32 entity; | |
443 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
444 | compat_uptr_t links; /* struct media_link_desc * */ | |
445 | __u32 reserved[4]; | |
446 | }; | |
447 | ||
448 | static long media_device_enum_links32(struct media_device *mdev, | |
449 | struct media_links_enum32 __user *ulinks) | |
450 | { | |
451 | struct media_links_enum links; | |
452 | compat_uptr_t pads_ptr, links_ptr; | |
453 | ||
454 | memset(&links, 0, sizeof(links)); | |
455 | ||
456 | if (get_user(links.entity, &ulinks->entity) | |
457 | || get_user(pads_ptr, &ulinks->pads) | |
458 | || get_user(links_ptr, &ulinks->links)) | |
459 | return -EFAULT; | |
460 | ||
461 | links.pads = compat_ptr(pads_ptr); | |
462 | links.links = compat_ptr(links_ptr); | |
463 | ||
464 | return __media_device_enum_links(mdev, &links); | |
465 | } | |
466 | ||
467 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
468 | ||
469 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
470 | unsigned long arg) | |
471 | { | |
472 | struct media_devnode *devnode = media_devnode_data(filp); | |
473 | struct media_device *dev = to_media_device(devnode); | |
474 | long ret; | |
475 | ||
476 | switch (cmd) { | |
477 | case MEDIA_IOC_DEVICE_INFO: | |
478 | case MEDIA_IOC_ENUM_ENTITIES: | |
479 | case MEDIA_IOC_SETUP_LINK: | |
8309f47c | 480 | case MEDIA_IOC_G_TOPOLOGY: |
b0a1f2a8 SA |
481 | return media_device_ioctl(filp, cmd, arg); |
482 | ||
483 | case MEDIA_IOC_ENUM_LINKS32: | |
484 | mutex_lock(&dev->graph_mutex); | |
485 | ret = media_device_enum_links32(dev, | |
486 | (struct media_links_enum32 __user *)arg); | |
487 | mutex_unlock(&dev->graph_mutex); | |
488 | break; | |
489 | ||
490 | default: | |
491 | ret = -ENOIOCTLCMD; | |
492 | } | |
493 | ||
494 | return ret; | |
495 | } | |
496 | #endif /* CONFIG_COMPAT */ | |
497 | ||
176fb0d1 LP |
498 | static const struct media_file_operations media_device_fops = { |
499 | .owner = THIS_MODULE, | |
140d8816 LP |
500 | .open = media_device_open, |
501 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
502 | #ifdef CONFIG_COMPAT |
503 | .compat_ioctl = media_device_compat_ioctl, | |
504 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 505 | .release = media_device_close, |
176fb0d1 LP |
506 | }; |
507 | ||
508 | /* ----------------------------------------------------------------------------- | |
509 | * sysfs | |
510 | */ | |
511 | ||
512 | static ssize_t show_model(struct device *cd, | |
513 | struct device_attribute *attr, char *buf) | |
514 | { | |
515 | struct media_device *mdev = to_media_device(to_media_devnode(cd)); | |
516 | ||
517 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
518 | } | |
519 | ||
520 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
521 | ||
522 | /* ----------------------------------------------------------------------------- | |
523 | * Registration/unregistration | |
524 | */ | |
525 | ||
526 | static void media_device_release(struct media_devnode *mdev) | |
527 | { | |
8f5a3188 | 528 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
529 | } |
530 | ||
b2ed8af9 MCC |
531 | /** |
532 | * media_device_register_entity - Register an entity with a media device | |
533 | * @mdev: The media device | |
534 | * @entity: The entity | |
535 | */ | |
536 | int __must_check media_device_register_entity(struct media_device *mdev, | |
537 | struct media_entity *entity) | |
538 | { | |
539 | unsigned int i; | |
540 | ||
541 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
542 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
543 | dev_warn(mdev->dev, | |
544 | "Entity type for entity %s was not initialized!\n", | |
545 | entity->name); | |
546 | ||
547 | /* Warn if we apparently re-register an entity */ | |
548 | WARN_ON(entity->graph_obj.mdev != NULL); | |
549 | entity->graph_obj.mdev = mdev; | |
550 | INIT_LIST_HEAD(&entity->links); | |
551 | entity->num_links = 0; | |
552 | entity->num_backlinks = 0; | |
553 | ||
554 | spin_lock(&mdev->lock); | |
555 | /* Initialize media_gobj embedded at the entity */ | |
556 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
557 | ||
558 | /* Initialize objects at the pads */ | |
559 | for (i = 0; i < entity->num_pads; i++) | |
560 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
561 | &entity->pads[i].graph_obj); | |
562 | ||
563 | spin_unlock(&mdev->lock); | |
564 | ||
565 | return 0; | |
566 | } | |
567 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
568 | ||
569 | /** | |
570 | * media_device_unregister_entity - Unregister an entity | |
571 | * @entity: The entity | |
572 | * | |
573 | * If the entity has never been registered this function will return | |
574 | * immediately. | |
575 | */ | |
821ed366 | 576 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
577 | { |
578 | struct media_device *mdev = entity->graph_obj.mdev; | |
579 | struct media_link *link, *tmp; | |
580 | struct media_interface *intf; | |
581 | unsigned int i; | |
582 | ||
b2ed8af9 MCC |
583 | /* Remove all interface links pointing to this entity */ |
584 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
585 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
586 | if (link->entity == entity) | |
587 | __media_remove_intf_link(link); | |
588 | } | |
589 | } | |
590 | ||
591 | /* Remove all data links that belong to this entity */ | |
592 | __media_entity_remove_links(entity); | |
593 | ||
594 | /* Remove all pads that belong to this entity */ | |
595 | for (i = 0; i < entity->num_pads; i++) | |
596 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
597 | ||
598 | /* Remove the entity */ | |
599 | media_gobj_destroy(&entity->graph_obj); | |
600 | ||
b2ed8af9 MCC |
601 | entity->graph_obj.mdev = NULL; |
602 | } | |
821ed366 MCC |
603 | |
604 | void media_device_unregister_entity(struct media_entity *entity) | |
605 | { | |
606 | struct media_device *mdev = entity->graph_obj.mdev; | |
607 | ||
608 | if (mdev == NULL) | |
609 | return; | |
610 | ||
611 | spin_lock(&mdev->lock); | |
612 | __media_device_unregister_entity(entity); | |
613 | spin_unlock(&mdev->lock); | |
614 | } | |
b2ed8af9 MCC |
615 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
616 | ||
821ed366 | 617 | |
176fb0d1 | 618 | /** |
9832e155 | 619 | * media_device_init() - initialize a media device |
176fb0d1 LP |
620 | * @mdev: The media device |
621 | * | |
622 | * The caller is responsible for initializing the media device before | |
623 | * registration. The following fields must be set: | |
624 | * | |
625 | * - dev must point to the parent device | |
626 | * - model must be filled with the device model name | |
627 | */ | |
9832e155 | 628 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 629 | { |
53e269c1 | 630 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 631 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
632 | INIT_LIST_HEAD(&mdev->pads); |
633 | INIT_LIST_HEAD(&mdev->links); | |
53e269c1 | 634 | spin_lock_init(&mdev->lock); |
503c3d82 | 635 | mutex_init(&mdev->graph_mutex); |
53e269c1 | 636 | |
9832e155 JMC |
637 | dev_dbg(mdev->dev, "Media device initialized\n"); |
638 | } | |
639 | EXPORT_SYMBOL_GPL(media_device_init); | |
640 | ||
641 | /** | |
642 | * media_device_cleanup() - Cleanup a media device | |
643 | * @mdev: The media device | |
644 | * | |
645 | */ | |
646 | void media_device_cleanup(struct media_device *mdev) | |
647 | { | |
648 | mutex_destroy(&mdev->graph_mutex); | |
649 | } | |
650 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
651 | ||
652 | /** | |
653 | * __media_device_register() - register a media device | |
654 | * @mdev: The media device | |
655 | * @owner: The module owner | |
656 | * | |
657 | * returns zero on success or a negative error code. | |
658 | */ | |
659 | int __must_check __media_device_register(struct media_device *mdev, | |
660 | struct module *owner) | |
661 | { | |
662 | int ret; | |
663 | ||
176fb0d1 LP |
664 | /* Register the device node. */ |
665 | mdev->devnode.fops = &media_device_fops; | |
666 | mdev->devnode.parent = mdev->dev; | |
667 | mdev->devnode.release = media_device_release; | |
8a950796 JMC |
668 | |
669 | /* Set version 0 to indicate user-space that the graph is static */ | |
670 | mdev->topology_version = 0; | |
671 | ||
85de721c | 672 | ret = media_devnode_register(&mdev->devnode, owner); |
176fb0d1 LP |
673 | if (ret < 0) |
674 | return ret; | |
675 | ||
676 | ret = device_create_file(&mdev->devnode.dev, &dev_attr_model); | |
677 | if (ret < 0) { | |
678 | media_devnode_unregister(&mdev->devnode); | |
679 | return ret; | |
680 | } | |
681 | ||
8f5a3188 MCC |
682 | dev_dbg(mdev->dev, "Media device registered\n"); |
683 | ||
176fb0d1 LP |
684 | return 0; |
685 | } | |
85de721c | 686 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 LP |
687 | |
688 | /** | |
689 | * media_device_unregister - unregister a media device | |
690 | * @mdev: The media device | |
691 | * | |
223d19c5 JMC |
692 | * It is safe to call this function on an unregistered |
693 | * (but initialised) media device. | |
176fb0d1 LP |
694 | */ |
695 | void media_device_unregister(struct media_device *mdev) | |
696 | { | |
53e269c1 LP |
697 | struct media_entity *entity; |
698 | struct media_entity *next; | |
d47109fa MCC |
699 | struct media_interface *intf, *tmp_intf; |
700 | ||
821ed366 MCC |
701 | if (mdev == NULL) |
702 | return; | |
703 | ||
704 | spin_lock(&mdev->lock); | |
705 | ||
223d19c5 | 706 | /* Check if mdev was ever registered at all */ |
821ed366 MCC |
707 | if (!media_devnode_is_registered(&mdev->devnode)) { |
708 | spin_unlock(&mdev->lock); | |
223d19c5 | 709 | return; |
821ed366 | 710 | } |
223d19c5 | 711 | |
f50d5166 MCC |
712 | /* Remove all entities from the media device */ |
713 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 714 | __media_device_unregister_entity(entity); |
f50d5166 | 715 | |
d47109fa | 716 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
717 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
718 | graph_obj.list) { | |
719 | __media_remove_intf_links(intf); | |
c350ef83 | 720 | media_gobj_destroy(&intf->graph_obj); |
d47109fa MCC |
721 | kfree(intf); |
722 | } | |
821ed366 | 723 | |
d47109fa | 724 | spin_unlock(&mdev->lock); |
53e269c1 | 725 | |
176fb0d1 LP |
726 | device_remove_file(&mdev->devnode.dev, &dev_attr_model); |
727 | media_devnode_unregister(&mdev->devnode); | |
8f5a3188 MCC |
728 | |
729 | dev_dbg(mdev->dev, "Media device unregistered\n"); | |
176fb0d1 LP |
730 | } |
731 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 732 | |
d062f911 SK |
733 | static void media_device_release_devres(struct device *dev, void *res) |
734 | { | |
735 | } | |
736 | ||
d062f911 SK |
737 | struct media_device *media_device_get_devres(struct device *dev) |
738 | { | |
739 | struct media_device *mdev; | |
740 | ||
741 | mdev = devres_find(dev, media_device_release_devres, NULL, NULL); | |
742 | if (mdev) | |
743 | return mdev; | |
744 | ||
745 | mdev = devres_alloc(media_device_release_devres, | |
746 | sizeof(struct media_device), GFP_KERNEL); | |
747 | if (!mdev) | |
748 | return NULL; | |
749 | return devres_get(dev, mdev, NULL, NULL); | |
750 | } | |
751 | EXPORT_SYMBOL_GPL(media_device_get_devres); | |
752 | ||
d062f911 SK |
753 | struct media_device *media_device_find_devres(struct device *dev) |
754 | { | |
755 | return devres_find(dev, media_device_release_devres, NULL, NULL); | |
756 | } | |
757 | EXPORT_SYMBOL_GPL(media_device_find_devres); | |
e576d60b SK |
758 | |
759 | #endif /* CONFIG_MEDIA_CONTROLLER */ |